When a trough of one light wave meets the trough of a second light wave what occurs

If the frequencies of two component waves are 24Hz and 20Hz, they should produce beats per second

Which unit would you use to express the height of your desk?

Describe how vibrations produced in your ear by a sound wave enable you to hear the sound.

The position of an object that is oscillating on an ideal spring is given by the equation x = (12.3cm) cos[ (1.26s-1) t]. (a) at time t=0.815 s, how fast is the object moving?

Why is your weight reading best shown when you stand at rest on the scale?

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?